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    • 7. 发明授权
    • System and method for precise recording
    • 用于精确记录的系统和方法
    • US08139462B1
    • 2012-03-20
    • US12953571
    • 2010-11-24
    • Zhiyuan RenXiaolei ShiVictor Petrovich Ostroverkhov
    • Zhiyuan RenXiaolei ShiVictor Petrovich Ostroverkhov
    • G11B7/00
    • G11B7/08511G11B7/0065G11B2007/00656
    • A method for calculation of recording depth in a holographic disk is disclosed. The method includes applying a first external voltage to one or more actuators coupled to an objective lens to focus a tracking beam of radiation having a first wavelength on a reference layer of the disk, wherein the reference layer comprises at least one of a partially dichroic coating or a partially metallized coating. The method also includes applying a second external voltage to the one or more actuators coupled to the objective lens to focus a recording beam of radiation on the reference layer of the disk, wherein the recording beam comprises a second wavelength different from the first wavelength of the tracking beam. The method further includes computing a difference between the first external voltage and the second external voltage. The method also includes calculating a lens-shift distance based upon the difference using a voltage-distance calibration curve, wherein the lens-shift distance refers to a shift in distance of the objective lens in order to focus the tracking beam of radiation and the recording beam of radiation on the reference layer respectively. The method also calculates the recording depth based upon the lens-shift distance.
    • 公开了一种用于计算全息光盘中的记录深度的方法。 该方法包括将第一外部电压施加到耦合到物镜的一个或多个致动器,以将具有第一波长的辐射的跟踪光束聚焦在盘的参考层上,其中参考层包括部分二向色涂层 或部分金属化涂层。 该方法还包括对耦合到物镜的一个或多个致动器施加第二外部电压以将记录光束聚焦在盘的参考层上,其中记录光束包括与第一波长不同的第二波长 跟踪光束。 该方法还包括计算第一外部电压和第二外部电压之间的差异。 该方法还包括使用电压 - 距离校准曲线基于差异来计算透镜移动距离,其中透镜移动距离是指物镜的距离偏移以聚焦跟踪光束和记录 参考层上的辐射束。 该方法还根据透镜移动距离计算记录深度。